Ferrule



FIG. 1 is a front perspective view of a ferrule.

FIG. 2 is a rear perspective view of the ferrule thereof.

FIG. 3 is a side view of the ferrule thereof.

FIG. 4 is a front end view of the ferrule thereof; and,

FIG. 5 is a rear end view of the ferrule thereof.

The dashed lines depict portions of the ferrule that form no part of the claim. 

CLAIM We claim the ornamental design for a ferrule, as shown and described. 